Year	Percent change (Units)
1993	23.140
1994	23.398
1995	0.701
1996	1.620
1997	-10.967
1998	5.509
1999	-8.861
2000	32.696
2001	-24.328
2002	15.103
2003	-5.914
2004	21.567
2005	10.605
2006	13.090
2007	16.874
2008	6.128
2009	-12.410
2010	11.475
2011	10.629
2012	6.343
2013	1.435
2014	12.259
2015	8.475
2016	13.117
2017	5.958
2018	7.224
2019	14.518
2020	-9.646
2021	12.445
2022	19.341
2023	-7.362
2024	3.002
2025	5.245
2026	4.627
2027	5.518
2028	5.426
2029	4.269